What's eating my can can heuchera?

Can Can Heuchera, like all heucheras, is most at risk from vine weevil, whose larvae destroy roots and cause plants to suddenly die. Adults create distinctive leaf notches. Aphids and slugs are secondary concerns. Annual nematode soil drenches in late summer and careful root checks when dividing are key prevention steps.

Leaf margin notching from adults; larvae consume roots causing wilting and crown detachment Apply Steinernema kraussei nematodes to moist soil in late August or September; remove affected crowns

Soft insect clusters on new growth and flower scapes; honeydew and sooty mould develop Blast with water; treat with insecticidal soap or neem oil; avoid over-fertilizing with nitrogen

Ragged holes in outer leaves, slime trails on foliage and surrounding soil Use iron phosphate pellets; hand-pick at night; keep garden free of dense debris near the plant